[6a3a178] | 1 | import { SimpleOuterSubscriber, innerSubscribe, SimpleInnerSubscriber } from '../innerSubscribe';
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| 2 | export const defaultThrottleConfig = {
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| 3 | leading: true,
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| 4 | trailing: false
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| 5 | };
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| 6 | export function throttle(durationSelector, config = defaultThrottleConfig) {
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| 7 | return (source) => source.lift(new ThrottleOperator(durationSelector, !!config.leading, !!config.trailing));
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| 8 | }
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| 9 | class ThrottleOperator {
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| 10 | constructor(durationSelector, leading, trailing) {
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| 11 | this.durationSelector = durationSelector;
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| 12 | this.leading = leading;
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| 13 | this.trailing = trailing;
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| 14 | }
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| 15 | call(subscriber, source) {
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| 16 | return source.subscribe(new ThrottleSubscriber(subscriber, this.durationSelector, this.leading, this.trailing));
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| 17 | }
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| 18 | }
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| 19 | class ThrottleSubscriber extends SimpleOuterSubscriber {
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| 20 | constructor(destination, durationSelector, _leading, _trailing) {
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| 21 | super(destination);
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| 22 | this.destination = destination;
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| 23 | this.durationSelector = durationSelector;
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| 24 | this._leading = _leading;
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| 25 | this._trailing = _trailing;
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| 26 | this._hasValue = false;
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| 27 | }
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| 28 | _next(value) {
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| 29 | this._hasValue = true;
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| 30 | this._sendValue = value;
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| 31 | if (!this._throttled) {
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| 32 | if (this._leading) {
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| 33 | this.send();
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| 34 | }
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| 35 | else {
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| 36 | this.throttle(value);
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| 37 | }
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| 38 | }
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| 39 | }
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| 40 | send() {
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| 41 | const { _hasValue, _sendValue } = this;
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| 42 | if (_hasValue) {
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| 43 | this.destination.next(_sendValue);
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| 44 | this.throttle(_sendValue);
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| 45 | }
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| 46 | this._hasValue = false;
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| 47 | this._sendValue = undefined;
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| 48 | }
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| 49 | throttle(value) {
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| 50 | const duration = this.tryDurationSelector(value);
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| 51 | if (!!duration) {
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| 52 | this.add(this._throttled = innerSubscribe(duration, new SimpleInnerSubscriber(this)));
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| 53 | }
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| 54 | }
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| 55 | tryDurationSelector(value) {
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| 56 | try {
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| 57 | return this.durationSelector(value);
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| 58 | }
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| 59 | catch (err) {
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| 60 | this.destination.error(err);
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| 61 | return null;
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| 62 | }
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| 63 | }
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| 64 | throttlingDone() {
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| 65 | const { _throttled, _trailing } = this;
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| 66 | if (_throttled) {
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| 67 | _throttled.unsubscribe();
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| 68 | }
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| 69 | this._throttled = undefined;
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| 70 | if (_trailing) {
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| 71 | this.send();
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| 72 | }
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| 73 | }
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| 74 | notifyNext() {
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| 75 | this.throttlingDone();
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| 76 | }
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| 77 | notifyComplete() {
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| 78 | this.throttlingDone();
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| 79 | }
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| 80 | }
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| 81 | //# sourceMappingURL=throttle.js.map |
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